1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b8b85ba132853ae56d1f990a5bd32cda7102440af0c3a31610ad89be321e2c. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c5106c8-f17b-44af-b6f9-cbe990c1f009.json and https://artists.proofprofile.net/proofs/artist/0c5106c8-f17b-44af-b6f9-cbe990c1f009.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7052c9fcf5e3212f064a69714e34840855e9c8b8c1a863a367f2eb4906371f2c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHF1311050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df6fd1096bc47224823cc21e4b32ad681aa0e2046c20cae14f389f7ca61f2e4. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:20:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHF1311041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa37a7bcdaa9a376d45d792da7eaa486be4a53a988534f2410748f9b9c8bf096. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHF1311100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80f388b3a6d7143565fbbbb22364bc95d00a60017f85c7720454598bb89ccc0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:02:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1473000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2a6b2b081a581e56c814384d2d4f8d22f5e64ba00819c43b41b3ea6b851ddd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1473004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143375effbeeb4d4d6b9faacb10d66a7d56f23e2e2c2321f9fc180f947d383b4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEN582100047.